You have the current Firefox, and updates are done within the browser. . Whenever you get a message / popup that software / files need to be updated;

DO NOT USE ANY OF THE PROVIDED LINKS

While this may be a legitimate message, it could also be Malware or a Virus. Any time you want or need to check for upgrades, go to the website of the True Owner of the program in question. For example, to check out Firefox, go to https://www.mozilla.org {web link}

You can report such a site at; Google Report Phishing Page {web link} which is the same when done while on site by going to Help > Report Web Forgery

Help us safeguard Mozilla’s trademarks by reporting misuse {web link}

This is the URL on the Urgent Firefox Message on my computer.

DO NOT CLICK THE LINK!!!!

https[:]//feipinofa[.]net/4041650332427/745659d1da791ec24daf3245c35fcfd7[.]html

DaveN55 said

This is the URL on the Urgent Firefox Message on my computer. DO NOT CLICK THE LINK!!!! https[:]//feipinofa[.]net/4041650332427/745659d1da791ec24daf3245c35fcfd7[.]html

Would not matter as these links only worked for the person who got it originally.

Added site to the list at https://support.mozilla.org/en-US/forums/contributors/712056

And replied to your thread on this at /questions/1134281